Ready to check out but don't want to fumble to open up Apple Wallet (previously named Passbook) to use Apple Pay to get out of the store? When your phone is locked, do a double push on the home button—Apple Pay should pop right up, with your cards ready to pick. You can turn this on (or off) in Settings > Touch ID & Passcode > Wallet. Also enable (or not) from Settings > Wallet & Apple Pay.